1.在实数范围内分解因式a^2-7= 2.P(x,y)是直角坐标系中一点:用二次根式表示点P到原点O的距离 如果X=根号2,y=根号7,求点P 到原点O的距离 3.一个三角形的三条边长分别为3 2 根号2 根号5,在如图所
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![1.在实数范围内分解因式a^2-7= 2.P(x,y)是直角坐标系中一点:用二次根式表示点P到原点O的距离 如果X=根号2,y=根号7,求点P 到原点O的距离 3.一个三角形的三条边长分别为3 2 根号2 根号5,在如图所](/uploads/image/z/7083188-44-8.jpg?t=1.%E5%9C%A8%E5%AE%9E%E6%95%B0%E8%8C%83%E5%9B%B4%E5%86%85%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8Fa%5E2-7%3D+2.P%28x%2Cy%29%E6%98%AF%E7%9B%B4%E8%A7%92%E5%9D%90%E6%A0%87%E7%B3%BB%E4%B8%AD%E4%B8%80%E7%82%B9%EF%BC%9A%E7%94%A8%E4%BA%8C%E6%AC%A1%E6%A0%B9%E5%BC%8F%E8%A1%A8%E7%A4%BA%E7%82%B9P%E5%88%B0%E5%8E%9F%E7%82%B9O%E7%9A%84%E8%B7%9D%E7%A6%BB+%E5%A6%82%E6%9E%9CX%3D%E6%A0%B9%E5%8F%B72%2Cy%3D%E6%A0%B9%E5%8F%B77%2C%E6%B1%82%E7%82%B9P+%E5%88%B0%E5%8E%9F%E7%82%B9O%E7%9A%84%E8%B7%9D%E7%A6%BB+3.%E4%B8%80%E4%B8%AA%E4%B8%89%E8%A7%92%E5%BD%A2%E7%9A%84%E4%B8%89%E6%9D%A1%E8%BE%B9%E9%95%BF%E5%88%86%E5%88%AB%E4%B8%BA3+2+%E6%A0%B9%E5%8F%B72+%E6%A0%B9%E5%8F%B75%2C%E5%9C%A8%E5%A6%82%E5%9B%BE%E6%89%80)
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